Infura Development Tutorials, Guides & Insights

Before diving into code examples, it's important to understand the core differences between Etherscan and Infura.

• Etherscan:
• Primarily a block explorer and data provider. It offers read-only access to Ethereum blockchain data such as transaction histories, balances, token transfers, and more.
• Does not allow real-time interaction with the blockchain (e.g., sending transactions).
• Ideal for querying historical data and performing analytics on blockchain data.
• Infura:
• Provides full node access to the Ethereum network, allowing developers to interact with the blockchain in real-time.
• Supports read and write operations, such as sending transactions, deploying smart contracts, and interacting with dApps.
• Best for applications that require real-time interaction with Ethereum, such as decentralized apps (dApps).

• Contract Address: Replace '0xTokenContractAddress' with the ERC-20 token contract’s address (for example, USDT, DAI, etc.).
• Wallet Address: Replace '0xYourWalletAddress' with the wallet address whose balance you want to query.
• ABI (Application Binary Interface): The ABI specifies the functions and data structures used in the smart contract. In this case, we’re using a simple balanceOf function to query the balance.

node contractInteraction.js

If you plan to use Infura as your Ethereum provider, follow these steps:

Now, let's create a script to query the balance of an Ethereum wallet. This script will work with both Infura and public nodes.

• Description: A blockchain developer platform offering APIs for building on Ethereum.
• Key Features:
• Provides enhanced APIs for Ethereum and Layer 2 solutions.
• Includes tools for debugging, monitoring, and analytics.
• Supports subscription-based WebSocket and HTTP APIs.
• High scalability and reliability for production DApps.
• Website: Alchemy

• Description: A serverless infrastructure platform for building DApps.
• Key Features:
• Provides a backend for DApps with built-in authentication, database, and file storage.
• Supports multiple blockchains including Ethereum, BSC, and Polygon.
• Real-time event syncing and notifications.
• Easy integration with popular front-end frameworks.
• Website: Moralis